Improvement in stump-extractors



@ruiten gisten gatent @frn ALONZO OROWNER, Olil WELLSVILLE, NEW- YORK.Letters Patent No. 72,269, dated December 17, 1867.

IMPROVEMENT IN vSTUMP-EXTRACTORS.

T0 ALL WHOM IT MAY CONCERN:

Be it known that I, ALONZO OROwNEn, of Wellsville, in the county ofAlleghany, and State of New York,- have invented a new and improvedMachine for Extracting Stumps and Stones; andl I do hereby declare-thatIthe following is a full, clear, and exact description thereof, referencebeing had tothe accompanying drawings, making a part of thisspecification, i'n which- Figure 1 is a plan view of the machinearranged for extracting a stump.

Figure 2 is a vertical section taken longitudinally throng-h the centreof the machine arranged ready to commence the operation of extracting astump.

Figure 3 is a similar section through the machine, showing both supportsadjusted near the drums.

Figure 4 is a. transverse section taken through the machine in the planeindicated by red line a: in iig. 1.

Similar letters` of reference indicate corresponding parts in theseveral figures.

This invention relates to certain novel improvements on machinery whichis designed for extracting stumps and large stones for clearing land.The nature of my invention consists in the direct application ofscrewpower for extracting stumps and stones by having a strongscrew-shaft, which is provided with means for turn-ing it, mounted upontrucks, one of which is to be staked to the ground and tlrectherfastened in a suitable manner to the stump or-stone which is to beextracted, so that when the screw-shaft is rotated the trucks will becaused to approach each other, and the stump or stone thereby extracted,as will be hereinafter described.

To enable others skilled in the art to understand my invention, I willdescribe its construction and operation.

In the accompanying drawings, A represents a right and left-handscrew-shaft of suitable length and strength, the ends of which aretapped through nuts or plates, a a, applied to two trucks, as shown. Thenut ais applied to the rear side and in the middle of the length of astrong axle, B, which is mounted upon two wheels, c c, and I the nut-ais applied to a head-block, D, which is connected to abolster, D', bymeans of a strongstaple, E. The bolster D is centrally pivoted to anaxle, B', by a king-pin, which axle is mounted upon two wheels c e. Thelegs of the staple E pass 'through the head-block D on both sides of thescrew-shaft A, and the ends of this staple are firmly secured .to thebolster, so that the headblock can be raised or lowered and sustained atany desired height by placing blocks between it and the bolster. Neartheextremities of therear axle B, land on the front side thereof, rods, FF, are suitably attached, which rods are somewhat longer than thegreatest distance allowed between thetwo axles B B. These rods passthrough cys bb on top and near the extremities of the bolster D', andhave hooks or heads on their front cndsf On'each side ofthe middle ofthe length of the screw-shaft A, and securely keyed to this shaft, are aright and left ratchet-wheel, and between these two wheels two largeflanged vdrums Gr G are applied, so as to turn loosely when not engagedwith the ratchet-wheels e e. On the inner faces of the drums G Gbevel-spur wheels,ff., are secured, the teeth of which'engage with apinion-wheel, g, on a transverse shaft, which has its end bearings uponone of the longitudinal rods F and a l collar, g', on shaft A. By thusconnecting the drums together, one will be caused to rotate to the rightwhen the other is rotated toward the left, and vice versa. The drum Ghas a pawl, t, pivoted to the outer face of one Aofits spokes, whichpawl will engage with the teeth ofthe ratchet-wheele and turn the shaftA in one direction only. On the outer side ofthe drum G', and pivoted toone of its spokes, is apa-wl, t, which, when it is engaged with itsratchet-wheel e, will turn shaft A in the same direction mentionedabove. Ropesor chains, lc k', are wound around the flanged drums G G forthe purpose of rotating them, which ropes pass off between guidesr J J,and over grooved rollers jj, which have their bearings between theseguides. The guides have arms projecting from 'their upper ends, andextending inward alongside of the drums G G', thereby keeping the guidesand rollers alwaysy in the same relative position with respect to saiddrums. Saidguides being hung from one of the rods F, as shown in fig. 4,this rod will slide freely through them as the trucks are moved towardand from each other. On the outer side of the drum G', and applied so asto vibrate freely on the shaft A, is a lever, k, carrying a right andleft-hand pawl, Z, which, when engaged with the ratchet-wheel e, willadmit of the shaft A being ,turned either tb theright or left, as may bedesired. When lever c is thus used, the pawls on the drums aredisengaged from their ratchet-wheels e e. On the front end of thescrew-shaft A, a square tenen, z', is formed for receiving a crank, bywhich the screw-shaft'can be rapidly rotated for adjusting andA settinffthe machine for o eration'.

On the front side et' the head-block .D, and at equal distances on eachside ot" the axis of 'shaft A, hooks m m are firmly secured forreceiving a yoke, N, and on the rear side of the rear axle B, hooks n nare firmly secured for receiving a Similar yoke, N. The yoke N is stakedto the ground at a proper distance from a stump which is to beextracted, and the two axles B B adjusted at a proper distance apart, asshown in figs. 1 and 2. by turning.,r the screw-shaft A with the crank,as above mentioned. The hcad-block D is then attached to the inclinedprop P by means of a link, p, hooking to an eye, a', on said prop, andattached to the yoke N. This prop is then connected in va suitablemanner to the stump' or stone to be extracted, after which the screw Ais rotated by the means above described, which will slowly but forciblymore the two axles B B toward cach other, and thus extract the stump orstone. The prop P, is used so that the power can be applied to a muchbetter advantage than could be done without it. The prop is inclined atthe connnencement of the operation, and as the axles or trucks areslowly drawn toward each other, the prop 'will assume an uprightposition, thus drawing upward, as well as laterally. The hcad-block D isso applied to the bolster upon axle B'that this ,head-block can rise orfall during the operation of extracting a stump or stone, and therebykeep the screwshaft A in a line with the line of draught.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

l. The screw-shaft A, applied to transportingtrucks, and provided withmeans-for rotating it, for the purpose of extracting stumps and stones,substantially as described.

2. Providing aiscrcw-shaft, A, which is applied to two trucks,substantially as described, with drums G G connected together byspur-wheels, so as to rotate in opposite directions, in combination withright and left pawls i 71,' and ratchet-wheels e e, substantially as andfor the purposes described.

3. The pendent guides J J, for supporting pulleys jj,'over which theropes 7c 7c ot' drums Gr G pass, in combination with a machine operatingsubstantially as described.

4. Sustaining the front end of the screw-shaft upon or by means of ahead-block, D, which is attached .to s. bolster, D', by a staple, E, sothat it can rise and fall, substantially as described.

5. The combination of the screw A, nut a', and prop P, substantially inthe manner and for the purpose herein described.

6. The combination of rods F F with a right and left screw-shaft A,which is supported upon trucks, and

operated substantially as described.

ALONZO CROWNER.

Witnesses:

I. J. ELLIOTT, HENRY WILLIAMs.

